Water heater



J. J. PIPER WATER HEATER April 25, 1950 Filed June 21, 1945 F .m r a a m w m .Qw -l Ill m w r w {W J .7 m 7. .4 9 2 l U 1 I 5 5 2 Z 1 u n m m 7. m M j n |1|||\||| J f L 1 m m J i atented Apr.

This invention relates to a waters 'heatenandhita is 6118:bj60t .of the:.-imzention tozprovidela heater whichimay: be: applied tcra water eboilei i-or. storag P tanhiand ha'saa;.coilassociated with itthnou whims-water.- is circulated so: thatzwater passing through the coil, which isllocated. in ithe firerboxz of :a 'furnace.- or ,coolnstove uwill beiheatedwind supplyzof hot watersstore wheui-neede Inricertain parts/ ot the;countryisvaten-isyr ferredztouas: .-'hard as ts. contains: considerable l0. lime. Continuous fiow-1of;.-suchwater.- through the; I heating COihLCfiAlsesi: thalime :to rbe deposited? on the inside of the;coikandrafteria period of time the coil-fiwill become. clogg-edxby lime, thusrinter -.r ferringswith flQW EOf' watr ithlillugh'thfi coil andw screating .a very dangerous conditione 1 Therefore itzzis zone: object. of their-mention to; provide :an improved-beatingsystem whereby; only:

a small. amountot Water is cirtn-ilaitedrepeatedly through. the coil; thus! reducinggto u a;-m'inimum,; theaamount. of." lime: which is :;deposited in; the! ooilnand eventually clearing-.therpassi gsthrongh the coil of lime; and -veryxiefiectivelygeliminatingr scaling Another..-object of: the invention =isitoa rovidea heating systemi whereim a-;. tank has:: an outer: casing and an inner casing spaced from 1112118 311 nularlwallfof thezouter. casing to provide a Water heating chamber surrounding the inner casing, there being a -heating. ccoiliihavin'g its ends 33: mounted throughthe wall of the outer casing and through which water circulatesfrom. a side por.- tion of the...heating,chamberso/that this water will be heatedtoa high temperature and serve to heat water in the inner .chamber by heat" 35 transmitted through. the-wall.iofitheinnenzoasing.

Another object .of. theinventibn; :is to provideii-a water heating system .of. such-menstruation:that

wateris' trapped-in the- Outenaheating chamber and repeatedly circulated. through! the rcoil by; 40 thermo syphonic-action.

Another obj ect ofthe invention-As to laprovi'dei a heater which isisimpleini construction and may be readily applied to a storagetank' of ordinary construction.

The invention is illustrated-.hr the: accompanying drawings wherein:

Fig. 1 is a view in elevation showing the improved heater connected with a storage tank for use.

Fig, 2 is a sectional view taken vertically through the heater.

Fig. 3 is a sectional view taken vertically through a heater of modified construction.

Fig. 4 is a fragmentary sectional view taken 55 2, transversely of a heater ha -vines an inner. casing of modifiediform-r 'Ilhis heater intendeclfor:supplying hot water to a, storagetank l of the type used-in; C01'1I1QC:-.v-- tionwithj a kitchen grange; or- -a;-furnace {or-heat zahouse or othervbui-lding'; Therheater: con sists of a atarrkr; which is-disposed vertically an has, its wbottoml; 3 fornied ;with an internall hreadedtne krqr bqss -to-i ceiv s a p ne c n-e- .stitlltingla verticaliydisno ed t nat-iq t a-pin lineizii through whic zwatenisdeIiVered in-toQa ner;cha .r:.1ieer l iQ med-withi agtne tax-in 2 10 an: inner c in ,8 I di po ed r ca lsfl fiz I and havi its upnen mi intesra y u ted with a disk-B wh ch s-h te to he eu s andme eas l 0- surrounding; th upper' end v oil-the tank, :2., It will thus; be seen that the disk;- serves .asclosuresfor the tankyZ and-the. casing 8 as Well-as con sti-tuting meansi-i r u p nd n the ea ing the tank in spaced relation to the annular Welland; the bottom of the .;-'tanl -..-L The -pipafi; projects upwardly; into the innercasing {to an. appreciable;.. distance-,asshown in Figure: 2, andterminates a approximately the levelrof thealowervtermina of 1a, 10011 I 2 which is toaextendnintorth fir jb g of: a furnace; or kitchen range-,1 and has its,upper; terminal-l3 communicating-with H Z theupn riend thereofw nce heflnuemasn s pa ed. from tneannulaewall f the-ou er as n or tank '2 space: M will be providedtabout. inner casing andwater;invthis space-will be ci cnlated through 'thescoil,;l2 -and1-heated torahighn temperature, and the inner casingwillbeheat so'that watera :Wit n-=.-this.- casing will betheated.

A conventional ven't valve 9 F is-providedto. allo escape: of air during -filli ng= of. the space! 4 ahou the innercasin withkwater. The-water; line 6 has-a fr-couplingrJ 5;-interpQSE;$d-in it, and frorn. this coupling:extendsani ple 6; wh c 'entersthew bottom of the storage tank 1- sothat-watehmayrhe delivered to. the storage.tankaaswellnas-to the heater. Hot waterxin thelinnerz casingaB YPQSSQSW out-throu h a p pehav n i s u per-finde nectedwitha T-Jcouplingv I8 carried a pipe; 1ine t1 l9'.havingits imjlel" no. section ZQrJeXtendi-ng; intosthe: tank I through; he top-thereot so rth t hotwate'rmaybedeliveredfromthe tank brough the pipe line l9 to spigots applied at terminal portions thereof.

When the heater is in use it is installed as shown in Figure 1 and the coil I2 is extended into the fire box of a furnace or cook stove. Water is delivered through pipe line 6 into the tank and into the inner casing 8 to fill the tank and the heater. A portion of th water in the heater 2 fills the space between the inner casing 8 and the wall of the main casing of the heater and this water flows into the coil i2 through the inlet H thereof and is heated to a high temperature before leaving the coil through the outlet 13 thereof and flowing into the upper portion of the space l4. This water is repeatedly circulated through the coil and the space [4. Water in the inner casing 8 becomes heated and this hot water is delivered from the heater through the pipe line I! to the storage tank and flows therefrom through pipe line [9 when spigots are opened.

In Figure 3 there has been illustrated a modified construction wherein the main casing 2| of the heater has a bottom 22 through which the pipe passes and an upper head 23 through which the pipe I7 passes. The inner casing 24 is formed with a head 25 having an internally threaded boss 26 at its center into which the threaded end of the pipe I? is screwed so that the pipe i7 constitutes means for centering the upper end of the inner casing 24 in the main casing 2| as well as serving as a distributing pipe. The lower end of the inner casing is open and supported by a suitable number of legs 27 spaced from each other circumferentially of the casing. There have also been provided braces 28 for centering the lower end of the inner casing in the main casing. The coil 29 is of the helical type used in gas heaters. A conventional vent valve 23' corresponding to the vent valve 9 is provided to allow escape of air during filling of the space about the inner casing with water. If so desired the inner casing of the heater may be formed as shown in Figure 4 wherein the inner casing 30 is corrugated in order to provide additional surface and cause the water in the inner casing to be more quickly heated by contact with the wall of the inner casing.

Having thus described the invention, what is claimed is:

1. A water heater comprising a main casing closed at its top and bottom, an inner casing in the main casing closed at its top and open at its bottom and having its open lower end spaced upwardly from the bottom of the main casing, said inner casing being spaced from the wall of the-main casing to provide a chamber of small capacity about the inner casing, a heating coil disposed externally of the heater with terminal portions communicating with upper and lower portions of the chamber about the inner casing, the upper terminal portion of said coil being spaced downwardly from the upper end of the inner casing and the lower terminal of the coil being spaced upwardly from the lower end of the inner casing, a water supply pipe extending upwardly through the bottom of the main casing and into the inner casing through the open lower end thereof, and an outlet pipe mounted through the top of the inner casing.

2. A water heater comprising a main casing having a bottom and having its upper end open and provided with a circumferentially extending flange, an inner casing in the outer casing spaced from the wall thereof and having its lower end open and spaced upwardly from the bottom of the main casing, a head closing the upper end of the 4 inner casing and having portions projecting radially therefrom and secured to said flange to close the upper end of the main casing and support the inner casing within the main casing, a

supply pipe passing upwardly through the bottom of the main casing centrally thereof and into the inner casing through the open lower end thereof, an outlet pipe communicating with the inner casing through an opening in the upper head thereof, and a heating coil disposed externally of the heater and having upper and lower terminal portions mounted through the wall of the main casing at one side thereof and communicating with the space in the main casing about the inner casing, the upper terminal portion of said coil being spaced downwardly from the upper end of the inner casing and the lower terminal of the coil being spaced upwardly from the lower end of the inner casing, the lower terminal of said coil being at approximately the level of the inner end of the supply pipe.

3. A water heater comprising a main casing having a bottom and having its upper end open and provided with a circumferentially extending flange, an inner casing in the outer casing spaced from the wall thereof and having its lower end open and spaced upwardly from the bottom of the outer casing, a head closing the upper end of the inner casing having portions projecting radially therefrom and secured to said flange to close the upper end of the main casing and support the inner casing within the main casing, a supply pipe entering the main casing through the bottom thereof and extending upwardly into the inner casing through the open lower end thereof, an outlet pipe mounted through the head and communicating with the upper end of the inner casing, and a heating unit disposed outwardly of the heater at one side thereof and having upper and lower terminal portions mounted through the wall of the main casing and communicating with space in the main casing about the inner casing, the upper terminal of said heating unit being spaced downwardly from the upper end of the inner casing and the lower end of said unit being spaced upwardly from the lower end of the inner casing.

JAMES J. PIPER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 50,422 McClosky Oct. 10, 1865 608,148 Brooks July 26, 1898 824,709 Demarest July 3, 1906 923,025 Curran May 25, 1909 1,305,110 Hughes May 27, 1919 1,730,736 Knudsen Oct. 8, 1929 1,755,082 Sims Apr. 15, 1930 FOREIGN PATENTS Number Country Date 227,241 Great Britain Jan. 15, 1925 

